JP4714247B2 - Rivet and its use - Google Patents

Description

  The present invention relates to a rivet for joining members and a method of using the rivet.

  Ordinary rivets are provided with a flange on the proximal end side of the shaft. In order to fasten a plurality of coupled members using such a rivet, rivet through holes are drilled in the plurality of coupled members that are superposed, and the shaft of the rivet is inserted into the rivet through hole. It is common to plastically deform the penetrating end in the diameter-expanding direction (see, for example, Patent Document 1).

On the other hand, instead of plastically deforming the penetrating end of the shaft, a technique of melting and deforming by heating with a heat source has also been attempted.
Japanese Patent Application No. 2007-118047

  In order to plastically deform the penetrating end of the rivet, it is necessary to apply an impact force to the shaft. Therefore, there is a problem that a large impact sound is generated.

  On the other hand, the one that heats and deforms the rivet shaft with a heat source can prevent the generation of impact sound, but a heat source that only melts the rivet material is indispensable. Such a heat source needs to pay close attention to management from the viewpoint of fire prevention and the like, and there is a problem that it is difficult to handle.

  The present invention is intended to provide a rivet that does not generate a large impact sound at the time of fastening, and that does not require the use of a heat source that is difficult to manage, and a method for using the rivet.

  The present invention employs the following configuration in order to solve the above-described problems.

That is, the rivet according to the present invention has a shaft which penetrates the rivet through-hole formed in a plurality of the conjugates to be joined, a flange portion in contact engagement the outer surface of the object to be conjugate provided on both end side of the shaft When the formed in a part of the shaft in cooperation with the flange portion be comprised by and a deformable bulge that binds an object to be conjugate to each other, the object conjugate, respectively table sheet A hollow plate having a cavity between the back sheet and the back sheet, a portion corresponding to the front sheet and the back sheet of the rivet through hole is a constricted portion to which the shaft is fitted, and a portion corresponding to the cavity is the is obtained by a non-constricted portion to permit expanded axis, said by the deformable bulge portion, the frictional heat generated upon binding transform a diameter direction portion corresponding to the cavity of said shaft It assumes that intended to be formed in a non-constricted portion To.

  The material of the rivet is not limited to resin, but may be metal or the like.

  As a typical configuration aspect of the rivet of the present invention, there are a two-part type and a one-part type.

  The two-part type rivet is press-fitted into a female member having a shaft having a shaft hole opened in the front end surface and a flange provided on the base end side of the shaft, and the shaft hole of the female member. An insertion projection and a male member having a flange provided on the base end side of the insertion projection, and relatively rotating the insertion projection of the male member in the shaft hole of the female member. The deformation bulge portion can be formed by expanding and deforming at least a part of the shaft by frictional heat generated during press-fitting.

  The one-part type rivet includes a tapered shaft that gradually decreases in diameter toward the tip, and a flange provided on the base end side of the shaft, and the shaft is relative to the coupled body. The deformed bulged portion can be formed by expanding and deforming at least a part of the shaft by frictional heat generated when press-fitting into the rivet through-hole while rotating.

  The two-part type rivet uses a rivet through hole having a constricted portion to which a shaft of the rivet is fitted and a non-constricted portion that allows the diameter of the shaft to be expanded. The rivet male member and the female member are pressed against each other in the rivet through-hole of the coupled body while rotating relatively, and at least the shaft of the shaft is caused by frictional heat generated by the relative rotational pressing operation. A portion corresponding to the non-constricted portion is expanded and deformed to form a deformed bulge portion, each flange portion of the male member and the female member, and the deformed bulge portion formed in the non-constricted portion, Then, the plurality of coupled bodies are fastened together.

  The one-part type rivet uses a rivet through-hole comprising a constricted portion into which a shaft of a rivet is press-fitted and a non-constricted portion that allows diameter expansion of the shaft. And the inner diameter of the constricted portion of the rivet through-hole is set to a value that is small enough to force the shaft of the rivet to be pushed in, and the rivet is rotated around the axis with respect to the coupled body. The shaft is caused to enter the rivet through hole while being relatively rotated, and a part of the shaft is expanded in the diameter direction by frictional heat generated between the shaft and the constricted portion of the rivet through hole due to the relative rotational press-fitting operation. And a deformed bulging portion is formed at a position passing through at least the constricted portion of the shaft by the expanded diameter deformation, and the plurality of coupled bodies are formed by the flange portion of the rivet and the deformed bulging portion. Mutual It entered into to.

  Here, “press-fitting while rotating relatively” means not only an operation of press-fitting while rotating in a relatively fixed direction, but also an operation of press-fitting while relatively rotating forward and reverse. Relative forward / reverse rotational motion includes those that repeat forward / reverse at various periods, and a fine forward / reverse rotational motion to the extent of vibration can be cited as an example.

  A preferable coupled body using the rivet is a hollow plate having a cavity between the front sheet and the back sheet, and a portion of the rivet through hole corresponding to the front sheet and the back sheet is the constricted portion. It is preferable that the portion corresponding to the cavity is a non-constricted portion.

  According to the present invention, it is possible to provide a rivet that does not emit an impact sound at the time of fastening and does not require preparation of a heat source that is difficult to manage, and a method for using the rivet.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  The rivet 1 according to the first embodiment of the present invention is composed of a pair of female members 2 and a male member 3 connected to each other as shown in FIG. 1, and both members are integrally formed of thermoplastic resin. Has been.

  The female member 2 has a shaft 21 with a shaft hole 211 opened at the distal end surface, a flange 22 provided on the proximal end side of the shaft 21, and a center portion of the flange 22 protruding in the opposite side to the shaft 21. The chucking projection 23 is provided. The shaft 21 has a tapered shape that gradually decreases in diameter toward the tip, and has a circular tip and a conical opening toward the flange 22, and this opening is used as the shaft hole 211. To do. The flange portion 22 has a circular shape having a radius larger than the proximal end radius of the shaft 21. The chucking protrusion 23 has a cylindrical shape, and is used for mounting the female member 2 on the rotary tool 71 and the fixing jig 72. The chucking protrusion 23 is cut off as necessary after fastening.

  The male member 3 includes an insertion protrusion 31 that is press-fitted into the shaft hole 211 of the female member 2, a flange portion 32 provided on the proximal end side of the insertion protrusion 31, and the insertion protrusion from the center of the flange portion 32. 31 and a chucking projection 33 projecting on the opposite side. The insertion protrusion 31 has a tapered shape with a gradually decreasing diameter toward the tip, and a portion adjacent to the flange 32 is circular and has a conical shape toward the tip. The conical shape of the insertion protrusion 31 has substantially the same inclination as the conical shaft hole 211 provided in the shaft 21, and a portion of about two-thirds of the distal end of the insertion protrusion 31 is provided in the shaft 21. The size is close enough to the shaft hole 211. The flange portion 32 is a circular shape having a radius larger than the proximal end radius of the insertion protrusion 31. The chucking protrusion 33 has a cylindrical shape, and is used for mounting the male member 3 on the rotary tool 71 or the fixing jig 72. The chucking protrusion 33 is cut out as necessary after fastening.

  Next, the usage method of the rivet 1 of 1st embodiment of this invention is demonstrated using FIG.2 and FIG.3. The bonded body of this embodiment uses the hollow plate 5 having a cavity 53 between the front sheet 51 and the back sheet 52.

  First, rivet through holes 6 for penetrating the female member 2 and the male member 3 are provided in a plurality of hollow plates 5 to be coupled. The rivet through-hole 6 includes a constricted portion 61 in which the shaft 21 of the rivet 1 is fitted to the hollow plate 5 and a non-constricted portion 62 that allows the shaft 21 to expand in diameter. Is set slightly smaller than the diameter of the shaft 21 of the rivet 1.

  The chucking protrusion 23 of the female member 2 is attached to the fixing jig 72 so that the shaft hole 211 provided in the shaft 21 of the female member 2 faces upward. Thereafter, the shaft 21 is inserted into the rivet through holes 6 provided in the plurality of hollow plates 5 to be coupled.

  Further, the chucking protrusion 33 of the male member 3 is mounted on the rotary tool 71 so that the tip of the insertion protrusion 31 of the male member 3 faces downward. Using the rotary tool 71, the insertion protrusion 31 of the male member 3 is press-fitted while being relatively rotated into the shaft hole 211 of the female member 2, so that the flanges 22 and 32 of the female member 2 and the male member 3 are fitted. The operation is continued until the front plates 51 and 51 of the hollow plates 5 and 5 are engaged. Here, “press-fitting while rotating relatively” means not only an operation of press-fitting while rotating in a relatively fixed direction, but also an operation of press-fitting while relatively rotating forward and reverse. Relative forward / reverse rotational motion includes those that repeat forward / reverse at various periods, and a fine forward / reverse rotational motion to the extent of vibration can be cited as an example.

  The insertion protrusion 31 of the male member 3 is pressed into the rivet through hole 6 of the hollow plate 5 while rotating relative to the shaft hole 211 of the female member 2, and the frictional heat generated by the relative pressing operation causes frictional heat generated by the relative pressing operation of the shaft 21. The portion corresponding to the non-constricted portion 62 is deformed by expanding its diameter. More specifically, a deformed bulging portion 8 in which a part of the shaft 21 is expanded and deformed is formed in the vicinity of the cavity 53 portion at the front end half of the shaft 21 and the back sheet 52 on the proximal end side of the shaft 21. .

  The female member 2 and the flanges 22 and 32 of the male member 3 engaged with the front sheet 51 of the hollow plate 5, and the deformed bulging portion 8 formed in the non-constricted portion 62, A plurality of hollow plates 5 can be fastened together.

  According to such a fastening mode, when a force that separates the hollow plates 5 acts, the shearing force acting on the flanges 22 and 32 due to the presence of the deformed bulging portion 8 can be effectively reduced. Accordingly, even a resin rivet exhibits a strong fastening force.

  Next, modified examples of the present embodiment are shown in FIGS. In the following modified example, components corresponding to the above-described embodiment are denoted by the same reference numerals with “A”, and detailed description thereof will be omitted.

  As shown in FIG. 4, the rivet A1 of this modification is composed of a pair of female member A2 and male member A3 that are connected to each other, and both members are integrally formed of thermoplastic resin.

  The female member A2 has a shaft A21 having a shaft hole A211 opened at the distal end surface, a flange A22 provided on the proximal end side of the shaft A21, and a center portion of the flange A22 projecting from the opposite side to the shaft A21. The chucking projection A23 is provided. The shaft A21 has a cylindrical shape, and has an opening having a circular tip end surface and a cylindrical shape that is about half the height of the shaft A21 toward the flange A22. The opening is used as the shaft hole A211. . The shapes and the like of the flange portion A22 and the chucking projection A23 are the same as those in the first embodiment.

  The male member A3 includes an insertion protrusion A31 that is press-fitted into the shaft hole A211 of the female member A2, a flange A32 provided on the base end side of the insertion protrusion A31, and a space between the insertion protrusion A31 and the flange A32. And a chucking projection A33 projecting from the center of the flange A32 on the side opposite to the insertion projection A31. The insertion protrusion A31 has a tapered shape with a gradually decreasing diameter toward the tip. The shape and the like of the flange A32 and the chucking protrusion A33 are the same as those in the first embodiment.

  Next, the usage method of rivet A1 of this modification is demonstrated using FIG.5 and FIG.6. The same hollow plate 5 as in the first embodiment is also used in the coupled body of this modification.

  First, the rivet through-hole 6 for penetrating the female member A2 and the male member A3 is provided in the plurality of hollow plates 5 to be joined. The rivet through hole 6 includes a constricted portion 61 in which the shaft A21 of the rivet A1 is fitted to the hollow plate 5 and a non-constricted portion 62 that allows the diameter of the shaft A21 to be expanded. Is set slightly smaller than the diameter of the axis A21 of the rivet A1.

  The chucking protrusion A23 of the female member A2 is mounted on the fixing jig 72 so that the shaft hole A211 provided in the shaft A21 of the female member A2 faces upward. Thereafter, the shaft A21 is inserted into the rivet through hole 6 provided in the plurality of hollow plates 5 to be coupled.

  Further, the chucking protrusion A33 of the male member A3 is mounted on the rotary tool 71 so that the tip of the insertion protrusion A31 of the male member A3 faces downward. Using the rotary tool 71, the insertion protrusion A31 of the male member A3 is press-fitted while being relatively rotated into the shaft hole A211 of the female member A2, and the flanges A22 and A32 of the female member A2 and the male member A3 are inserted. The operation is continued until the front plates 51 and 51 of the hollow plates 5 and 5 are engaged.

  The insertion projection A31 of the male member A3 is pressed in the rivet through hole 6 of the hollow plate 5 while rotating relative to the shaft hole A211 of the female member A2, and the frictional heat generated by the relative pressure contact operation causes the shaft A21 to move. The portion corresponding to the non-constricted portion 62 is deformed by expanding its diameter. More specifically, a deformed bulging portion 8 in which a part of the shaft A21 is expanded and deformed is formed in the cavity 53 portion on the tip end side half of the shaft A21.

  The female member A2 and the flanges A22, A32 of the male member A3 engaged with the front sheet 51 of the hollow plate 5 and the deformed bulging portion 8 formed in the non-constricted portion 62, A plurality of hollow plates 5 can be fastened together.

  According to such a fastening mode, as in the first embodiment, when a force that separates the hollow plates 5 acts, the shearing force that acts on the flanges A22 and A32 due to the presence of the deformed bulging portion 8 is effective. Therefore, even a resin rivet exhibits a strong fastening force.

  Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 7, the rivet 4 according to the second embodiment includes a shaft 41 having a tapered shape that gradually decreases in diameter toward the tip, a flange 42 provided on the proximal end side of the shaft 41, and the flange 42 is provided with a chucking protrusion 43 protruding from the center of 42 opposite to the shaft 41, and is integrally formed of a thermoplastic resin.

  The shaft 41 has a tapered shape with a gradually decreasing diameter toward the tip, and has a circular opening on the tip surface and a cylindrical opening that is about half the height of the shaft 41 toward the flange portion 42. . The flange portion 42 has a circular shape having a radius larger than that of the base end portion of the shaft 41. The chucking protrusion 43 has a cylindrical shape, and is used for mounting the female member 2 on the rotary tool 71 and the fixing jig 72. The chucking protrusion 43 is cut out as necessary after fastening.

  Next, the usage method of the rivet 4 of this embodiment is demonstrated using FIG.8 and FIG.9. The same hollow plate 5 as in the first embodiment is also used in the coupled body of the present embodiment.

  First, the rivet through-hole 6 for penetrating the rivet 4 is provided in the plurality of hollow plates 5 to be joined. The rivet through-hole 6 is composed of a constricted portion 61 in which the shaft 41 of the rivet 4 is fitted to the hollow plate 5 and a non-constricted portion 62 that allows the diameter of the shaft 41 to be expanded. The rivet in the constricted portion 61 The size of the through hole 6 is set to such a small value that the inner diameter of the constricted portion 61 of the rivet through hole 6 needs to be forced into the shaft 41 of the rivet 4.

  The chucking projection 43 is attached to the rotary tool 71 so that the opening provided in the shaft 41 faces downward. Further, the shaft 41 is inserted into the rivet through holes 6 provided in the plurality of hollow plates 5 to be coupled. Thereafter, the rotary tool 71 is used to press-fit the shaft 41 while rotating the shaft 41 relative to the hollow plate 5, and the operation is continued until the flange portion 42 engages with the front sheet 51 of the hollow plate 5.

  Due to the frictional heat generated between the shaft 41 and the constricted portion 61 of the rivet through hole 6 due to the relative rotational press-fitting operation, a portion corresponding to the non-constricted portion 62 of the shaft 41 is deformed in the diameter increasing direction. More specifically, a deformed bulge in which a part of the shaft 41 is deformed and expanded at the cavity 53 in the vicinity of the front sheet 51 and the back sheet 52 of the hollow plate 5, particularly at a position where the shaft 41 passes through the constricted portion 61. Part 8 is formed.

  The plurality of hollow plates 5 can be fastened to each other by the flange portion 42 engaged with the front sheet 51 of the hollow plate 5 and the deformed bulging portion 8 formed in the non-constricted portion 62.

  The present invention is not limited to the above embodiment.

  The to-be-joined body couple | bonded by this embodiment should just be a thing which can form a non-constriction part between a front sheet | seat and a back sheet, and is not restricted to the hollow plate which has a cavity.

  The material of the rivet is not limited to resin, and may be metal or the like.

  Other specific configurations of the respective parts are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

The perspective view which shows 1st embodiment of this invention. The reference diagram which shows the use condition before the fastening of the first embodiment. The reference view which shows the use condition after the conclusion of the first embodiment. The perspective view which shows the 1st embodiment modification of this invention. The reference view which shows the use condition before the fastening of the modification. The reference figure which shows the use condition after the fastening of the modification. The perspective view which shows 2nd embodiment of this invention. The reference figure which shows the use condition before the fastening of the second embodiment. The reference figure which shows the use condition after the conclusion of the second embodiment.

Explanation of symbols

1, A1 ... Rivet (2 parts type)
2, A2 ... Female member 21, A21 ... Shaft (2 parts type)
211, A211 ... shaft hole 22, A22 ... buttocks (female member)
3, A3 ... male member 31, A31 ... insertion protrusion 32, A32 ... buttocks (male member)
4 ... Rivets (1 part type)
41 ... Shaft (1 part type)
42 ... Buttocks (1 part type)
DESCRIPTION OF SYMBOLS 5 ... Hollow plate 51 ... Front sheet 52 ... Back sheet 53 ... Cavity 6 ... Rivet through-hole 61 ... Constriction part 62 ... Non-constriction part 8 ... Deformation bulge part

Claims (4)

A shaft which penetrates the rivet through-hole formed in a plurality of the conjugates to be combined, and the flange portion in contact engagement the outer surface of the object to be conjugate provided on both end side of the shaft, forms a part of the shaft A rivet comprising a deformed bulging portion that couples the coupled bodies in cooperation with the flange portion,
Each of the coupled bodies is a hollow plate having a cavity between a front sheet and a back sheet, and a portion corresponding to the front sheet and the back sheet of the rivet through hole is a constricted portion to which the shaft is fitted. The portion corresponding to the cavity is a non-constricted portion that allows the shaft to expand,
The deformable bulge portion is state, and are not formed in the non-constricted portion by deforming the diameter direction portion corresponding to the cavity of the shaft by frictional heat generated during binding,
A female member having the shaft having a shaft hole opened in the distal end surface and the flange provided on the proximal end side of the shaft, an insertion protrusion press-fitted into the shaft hole of the female member, and the insertion A male member having the flange portion provided on the base end side of the protrusion, and when the insertion protrusion of the male member is press-fitted into the shaft hole of the female member while being relatively rotated. by frictional heat generated, rivet, characterized in der Rukoto those configured so as to form the deformed bulged portion.   A shaft penetrating into a rivet through-hole provided in a plurality of coupled bodies to be coupled, a flange provided on at least one end side of the shaft and engaging with an outer surface of the coupled body, and formed on a part of the shaft In the rivet comprising a deformed bulging portion that couples the coupled bodies in cooperation with the collar portion,
  The deformation bulge portion is formed by deforming a part of the shaft in the diameter increasing direction by frictional heat generated at the time of coupling,
  A female member having a shaft with a shaft hole opened in the distal end surface and a flange provided on the base end side of the shaft, an insertion protrusion press-fitted into the shaft hole of the female member, and the insertion protrusion Friction generated when the insertion protrusion of the male member is pressed into the shaft hole of the female member while being relatively rotated. A method of fastening a plurality of coupled bodies using a rivet configured such that at least a part of the shaft is expanded and deformed by heat to form the deformed bulging portion,
  A rivet through hole comprising a constricted portion into which a shaft of a rivet is fitted and a non-constricted portion allowing the diameter of the shaft to be expanded is provided in a member to be coupled, and the male member of the rivet The female member and the female member are pressed against each other in the rivet through-hole of the coupled body while being relatively rotated, and at least a portion corresponding to the non-necked portion of the shaft is expanded by frictional heat generated by the relative rotational pressing operation. The deformed bulges are deformed to form the bulges of the male member and the female member, and the deformed bulges formed in the non-constricted part to connect the plurality of coupled bodies. A method of using a rivet characterized by fastening.   A shaft penetrating into a rivet through-hole provided in a plurality of coupled bodies to be coupled, a flange provided on at least one end side of the shaft and engaging with an outer surface of the coupled body, and formed on a part of the shaft In the rivet comprising a deformed bulging portion that couples the coupled bodies in cooperation with the collar portion,
  The deformation bulge portion is formed by deforming a part of the shaft in the diameter increasing direction by frictional heat generated at the time of coupling,
  A tapered shaft having a gradually decreasing diameter toward the distal end and a flange provided on the proximal end side of the shaft, the rivet through-hole while rotating the shaft relative to the coupled body A method of fastening a plurality of coupled bodies using a rivet configured such that at least a part of the shaft is expanded in diameter and deformed to form the deformed bulged portion by frictional heat generated when press-fitting into the shaft. Because
  A rivet through hole having a constricted portion into which a shaft of a rivet is press-fitted and a non-constricted portion that allows the diameter of the shaft to be expanded is formed in a member to be coupled, and the rivet through hole is formed. The inner diameter of the constricted portion is set to a value that is small enough to force the rivet shaft to be pushed in, and the rivet is rotated relative to the coupled body around the axis while the shaft is moved to the rivet. A portion of the shaft is deformed in the diameter-expanding direction by friction heat generated between the shaft and the constricted portion of the rivet through-hole by the relative rotational press-fitting operation, and the diameter expansion deformation A rivet characterized in that a deformed bulging portion is formed at a position passing through at least the constricted portion of a shaft, and the plurality of coupled bodies are fastened by a flange portion of the rivet and the deformed bulging portion. of How to use. The coupled body is a hollow plate having a cavity between a front sheet and a back sheet, and a portion corresponding to the front sheet and the back sheet of the rivet through hole is the constricted portion, and corresponds to the cavity. The method of using a rivet according to claim 2 or 3, wherein the part is a non-constricted part .

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